如果没有机械的帮助，一天的劳动不足以生产一磅棉花。

永远不要低估一个想法改变世界的力量。

Every piece of plastic we produce should have a clear path to being reused or recycled.

To do mathematics is to engage in an act of creation and discovery simultaneously.

每一场演出对我来说都是新的挑战。

Writing for children is a responsibility—they deserve the truth, even when it's hard.